期刊
MOLECULES
卷 27, 期 1, 页码 -出版社
MDPI
DOI: 10.3390/molecules27010202
关键词
aggregation-induced emission; dichloromethane; vapor phase; cost-effective
资金
- Birla Institute of Technology and Science (BITS) Pilani, Pilani campus, Rajasthan (India)
- Department of Biotechnology (DBT), GOVERNMENT OF INDIA [BT/PR33133/MED/32/704/2019]
- UGC [F.540/14/DRS/2007]
- DST-FIST [SR/FST/CSI-270/2015]
In this study, we developed an aggregation-induced emission (AIE) active probe molecule that can selectively and sensitively detect dichloromethane (DCM) vapor with a short response time. The use of low-cost filter paper as a substrate extends the application of this probe, which can be reused.
Selective vapor-phase detection of dichloromethane (DCM) is a challenge, it being a well-known hazardous volatile organic solvent in trace amounts. With this in mind, we have developed an 'Aggregation-induced Emission' (AIE) active mono-cyclometalated iridium(III)-based (M1) probe molecule, which detects DCM sensitively and selectively in vapor phase with a response time <30 s. It reveals a turn-on emission (non-emissive to intense yellow) on exposing DCM vapor directly to the solid M1. The recorded detection limit is 4.9 ppm for DCM vapor with pristine M1. The mechanism of DCM detection was explored. Moreover, the detection of DCM vapor by M1 was extended with a low-cost filter paper as the substrate. The DCM is weakly bound with the probe and can be removed with a mild treatment, so, notably, the probe can be reused.
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